.clearfix:after{
	content: '';
	display: block;
	clear: both;
}

header{
	background: rgba(0,0,0,0.3);
}

nav{
	background: transparent;
	height: 50px
}
.banner{
	background: transparent;
	height: 700px;
	color: #fff;
}

nav ul{
	list-style: none;
	float: right;
	margin: 0;
}

nav ul li,nav .logo{
	display: inline-block;
	line-height: 50px;
	margin-right: 20px;
}

nav ul li a{
	text-decoration: none;
	line-height: inherit;
	display: inline-block;
	height: inherit;
	color: #fff
}

nav ul li.logo{
	float: left;
}

.banner .inner{
	max-width: 300px;
	text-align: center;
	margin: 0 auto;
	/*上下margin为0 左右为自动*/
	position: relative;
	top: 130px;
}

.banner .inner h1{
	margin: 0;
}

button{
	border: none;
	background: #333;
	color: #eee;
	padding: 10px;
}

.banner button{
	padding: 12px 40px;
}

.banner .inner .more{
	margin-top: 320px;
}

.sub-heading{
	line-height: 30px;
	margin: 10px;
}

.logo{
	font-size: 20px;
	font-weight: 700;
	/*字符间距*/
	letter-spacing: 1px;
}

.logo a{
	text-decoration: none;
	padding: 15px;
	color: #fff
}

ul{
	margin: 0;
}

h1{
	padding: 12px;
	border-top:2px solid #fff;
	border-bottom:2px solid #fff; 
}

h2{
	font-size: 30px;
}

h3{
	font-size: 24px;
}

p{
	font-size: 18px;
	letter-spacing: 1px;
}

.hr{
	height: 2px;
	width: 100%;
	margin: 20 auto;
}

.green-section{
	background: #089DB0;
	color: #fff;
	text-align: center;
	padding: 100px 0;
}

.green-section .hr{
	background: #078494;
	width: 60%;
	margin: 0 auto;
}

.wrapper{
	max-width: 1080px;
	margin: 0 auto;
}

.sub-heading{
	font-size: 18px;
}

.icon-group{
	margin-top: 20px;
}

.green-section{
	background: #334A56;
	color: #fff;
}

.green-section .icon-group .icon{
	display: inline-block;
	width: 80px;
	height: 80px;
	background: #078494;
	transform: rotate(45deg);
	margin: 20px;
}

.img-section img{
	width: 100%;
}

.gray-section{
	background: #252F34;
	color: #fff;
}

.gray-section .img-section{
	width: 45%;

}

.gray-section .text-section{
	width: 55%;
}

.article-preview > div{
	float: left;
	font-size: 0;
}

.article-preview:nth-child(odd){
	background-color: rgba(255,255,255,0.05);
}

.article-preview:after{
	content: '';
	display: block;
	clear: both;
}

.text-section{
	position: relative;
	top: 68px;
	left: 55px;
}

.text-section h2{
	margin-bottom: 20px;
}

.text-section p{
	font-size: 18px;
	letter-spacing: 1px;
}

.text-section > *{
	max-width: 90%;
}

.purple-section{
	padding: 80px;
	background: #3F3965;
	color: #fff;
}

.purple-section .heading-wrapper{
	text-align: center;
}

.purple-section .hr{
	width: 60%;
	margin: 0 auto;
	background: #373259;
}

.card{
	float: left;
	width: 50%;
	min-height: 300px;
	padding: 50px;
	-webkit-box-sizing:border-box;
	-moz-box-sizing:border-box;
	box-sizing:border-box;
}

.card:first-child{
	background: rgba(0,0,0,0.05);
}

.card:nth-child(2){
	background: rgba(0,0,0,0.08);
}

.card:nth-child(3){
	background: rgba(0,0,0,0.12);
}

.card:nth-child(4){
	background: rgba(0,0,0,0.16);
}

.card:nth-child(5){
	background: rgba(0,0,0,0.20);
}

.card:nth-child(6){
	background: rgba(0,0,0,0.24);
}

footer{
	background: #333;
	color: #fff;
	min-height: 200px;
	text-align: center;
}
ul.share-group{
	display: block;
	/*width: 1080px;*/
	margin: 0 auto;
	padding: 50px;
}

.share-group li{
	display: inline-block;
	padding: 10px;
}

.copy{
	padding-bottom: 20px;
}

.main-wrapper{
	background: #444 url(../img/pc3.jpg);
	background-attachment: fixed;
	background-repeat: no-repeat;
	background-size: cover;
	background-position: center center 
}